I am a California native and most of my work is in my home area, the Sacramento-Roseville-Loomis-Auburn corridor along Interstate 80 in California. Since I have retirement property near Jamestown I am also working in that area, and have also done some clean-up in areas where I have some familiarity such as my parents' house and favorite vacation areas. I do find my undiagnosed ADHD kicking in occasionally and find myself chasing a power line or railroad across the state at 3:00am.
All my work to date has been in Potlatch. I am toying with JOSM, but so far Potlatch's Yahoo image support has been too nice to pass up.
Almost all my work to date has been TIGER data clean-up and good lord there's a lot of that to be done. There are often "obvious" items that I have felt compelled to add when decent source data is available.
My GPS of choice is a Garmin GPSmap 60CSx. I have a collection of tracks from hikes and horseback rides that I need to review, but haven't gotten around to that yet.
This is way too addictive for a cartophile!